Instruction:Press the button at the side, the LED's show the current time. Press the button again will display the date.

Time mode:The 12 blue LED's in the top arch show the current hour and the minutes, which can be computed from the two LED rows below.The 5 red LED's in the middle display the time exactly to 10 minutes and the lower 9 blue LED's show the time exactly to one minute.Adding these two results to the exact time exactly to one minute.

Date mode:The 12 top blue LED's display the current month and the two LED rows beneath show the day in the month.The 3 red bottom LED's will always display the current mode (Date, AM, PM).